TargetTalk

Hi all i just got a Steyr lg110 2nd hand but did not come with the barrel weights. Iam just starting out so dont know if these are neccesary or not,although i can say that i do find it very hard to stabalise the gun while aiming?

If anyone could give me some advise it would be greatly appreciated?

Can anyone tell me who makes this?
http://www.euroshooting.eu/en/index.php ... etail=1230